McCain and Obama campaign in Western U.S.

Republican John McCain and Democrat Barack Obama have begun battling it out in Western States in the race for president. The West is likely to be pivotal battlegrounds that could shape the November election. Today, Obama is campaigning in Nevada where he's expected to talk about the economy. Meanwhile, McCain spent the Memorial Day holiday in New Mexico, criticizing his rival for being naive on foreign policy. The two candidates have largely ignored Obama's rival, Senator Hillary Clinton, despite saying she's determined to stay in the race. The former first lady is trailing Obama in the number of delegates needed to clinch the nomination.